Heating and ventilating apparatus



Nov. 16 1926.

A. R. TEARE HEATING AND VENTILATING APPARATUS Filed Jan. 27. 1926 grwmfloz I (22m v as, $24 A {21 anon? Patented Nov. 16, 1926.

UNITED STATES PATENT OFFICE.

ALBERT R. TEARE, OF LAKEWOOD, OHIO, ASSIGNOR TO JAMES C. MILES. OF CLEVELAND,

' OHIO.

HEATING AND VENTILATING .dPPARATUfi Application filed January 27. 1926. Serial No. 84,681.

This invention relates to heating and ventilating apparatus and is especially concerned with a fan and damper unit which may be employed in connection with the operation of a hot air heating system.

One of the objects of the present invention is to provide a fan and damper unit which is disposed adjacent the inlet to a hot air heating furnace and which is so designed that thedamper is positively actuated whenever the fan is either set in motion or stopped. To this end I employ an electrically operated fan with a mechanical connection between the switch and the damper so as to shut the damper when the fan is started and to open the damper when the fan is stopped. In this way, the inlet passageway is sufliciently opened to permit the normal operation of the system on the gravity basis. Moreover, whenever the fan is set in operation, the-damper is positively closed so that all of the air entering the system, must flow only through the fan opening.

The preferred means for carrying out my invention is illustrated in the accompanying drawings wherein Fig. 1 is a side elevation of a hot air, heating furnace having my invention associated therewithyFig. 2 is a section taken on a plane indicated by the line 22 in Fig. 1; while Fig. 3 is a section taken on a plane indicated by the line 33 in Fig. 2; F i s. 4 and 5' are sections showing details 0 construction of the control mechanism.

I have illustrated my invention in connection with a hot air furnace indicated at 10 which has an inlet passageway adjacent the bottom thereof. This passageway is shown in the nature of a conduit which is rectangular in cross-section. Disposed across the inlet passageway I have shown a frame 15 which has a fan opening '16 and a damper opening 17 arranged side by side.

A fan 18 with an actuating motor 19 is shown adjacent the fan opening, while a damper 20 which is pivotally mounted at 21 is shown adjacent the damper opening.

The circuit to the motor is controlled by a switch which is mounted within a switch box 25. Any suitable knife switch may be suflicient for this purpose, but the construc tion illustrated embodies an operating arm 26 which is disposed outside the box and is mounted upon a pivot 27. Within "the box 25, I have shown a sheave 28 which is also mounted upon the shaft 27 and is operatively connected as by cords or chains 30 to an arm 31 which is mounted on the shaft 21 outside the conduit 11. In this way the damper may be swung from open to closed position whenever the arm 26 is moved to open the circuit to the motor 19. In Fig. l. the damper is shown in open position in full lines, while the closed position is indi cated by the broken lines 31. A corre-' sponding position of the actuating arm is indicated at 26.

An advantage of an apparatus embodying my invention is that the control box may be placed in a room above the furnace room and that the operator is assured of a positive closing of the damper whenever the fan is started. Moreover my invention may be readily installed in existing furnaces withoutnecessit-ating changes in the construction thereof.

I claim: 1. In combination, a heating chamber of a hot air furnace having an air lnlet, a fan and damper dis osed across the inlet, an

electric motor. or actuating the fan, a switch for controlling the operation of said motor, and a mechanical connection between the switch and damper, whereby the damper is closed when the SWitGlih iS open, and is opened when the switch is closed.

2. In combination with the heating chamber of a hot air furnace having an air inlet passageway, of a frame disposed across the passageway, a fan and a damper associated with the frame, an electric motor for operating the fan and a switch for controlling the circuit to said motor, there being a positive mechanical connection between the switch and damper, whereby operation of the switch effects operation of the damper.

3. In combination with the heating chamber of a hot air furnace having an inlet passageway, of a frame disposed across the passageway and having a fan opening and a damper opening, a damper pivotally mounted across the damper opening, a fan disposed adjacent the fan opening, an electric for said switch and a mechanical connection 4; In combination with the heating cham-. ber of a hot air furnace having an inlet passageway, of a frame disposed across the passageway and having a. fan opening and a damper opening, an electrically operated motor having a fan associated :therewith and disposed adjacent the fan opening, a

on said pivot and means connecting the sheave with said damper whereby operation of the sheave efiects operation of the damper, said sheave being actuated whenever the switch' is actuated so as to close the damper whenever the fan is set in operation, and to open the damper whenever the fan is stopped.

In testimony whereof, I hereunto 'aflix 20 my signature.

ALBERTv R. TEARE. 

